In Third Degree Heart Block with a rate of 40-60 bpm,with a QRS of less than 0.12 sec,you should suspect that the pacemaker controlling the heart is located in the:
A)SA node.
B)atria.
C)AV junction.
D)ventricles.

Question

Quizplus · Accepted Answer

Third degree heart block is characterized by a complete dissociation between the atria and ventricles. In this case, the pacemaker controlling the heart is located in the AV junction, as it is responsible for transmitting electrical signals from the atria to the ventricles. A pacemaker located in the SA node or atria would not be able to maintain the appropriate ventricular rate, and a pacemaker located in the ventricles would result in a widened QRS complex.

In Third Degree Heart Block with a Rate of 40-60